Car truck



March 5, 1929. s, 5l W|||PP5 1,704,452

GAR TRUCK A Filed Feb. 4,' 19,28 2 Sheets-Sheet l l SOLOMON s. WH| PPS ATTORN EY March 5, 1929. s. s. wHlPPs CAR TRUCK Filed Feb. 4, 1928 2 Sheets-Sheet INVENTOR SOLOMON WHPPS ATTCRNEY Patented Mar. 5, 1929.

UNITED STATES SOLOMON S. WHIPPS, F MINNEAPOLIS, MINNESOTA.

CAR TRUCK.

Application. filed February 4, 1928. Serial No. 251,849.

This invention relates to car trucks, such as employed in street cars and railroad cars, and the main object is to provide an eihcient, practical and comparatively simple truck construction, that may be operated with a minimum amount of power, that Will serve as a proper and yielding support for the superstructure ot the car, and which is so constructed that it will eliminate much oit' the chattering, vibrations, and noises which are incident to the truck structures now commonly in use. Further and more speciiic objects will be disclosed in the. course of the following specification, reference being had to the ac companying drawings, wherein:

1 is a. plan View ot' a car sill or trame, and showing my improved truck structures as arranged thereunder.

Fig. 2 is a side elevation of the structure as shown in Fig. 1. n

Fig. 3 is a` sectional elevation on the line 3 3 in Fig. 2.

Fig. 4 is a sectional elevation on the line 4--fl in Fig. 6.

Fig. 5 is a sectional detail view on the line 5 5 in Fig. 4.

Fig. 6 is an enlarged detail plan view, partly in section, as on the line GMG in Fig. 4.

Fig. 7 is an enlarged detail view as on the line 7--7 in F ig. 1.

Fig. 8 is a diametrical, sectional view, on the line SMS in Fig. 7.

Fig. 9 is an enlarged detail view oi" one corner portion of my improved truck structure.

i 1U is an enlarged detail section on the line 10-10 in Fig. 55.

Referring to the drawings n'lore particularv and by reference characters, A. designates he sill or main traine oi the car, B designates enerally the front supporting truck, (l the rc* r supporting truck, and D the rails upon which the car travels. The trucks B and C are substantially identical in construction, except that the power mechanism is applied to the truck unit B. It will be understood, however, that power may be applied to either or both units, although I prefer to apply the driving power to the front truck unit of the car only.

Each 'truck unit comprises a pair oi'I axles 11 and 12, having integrally formed wheels 13, bearing boxes 14, at the ends of the axles, laterally disposed hanger bars 15, to the ends ot which are secured the bearing boxes 14,

at its end which rotatably engage studs 21, de`

pending' from the cross beams, While the upper tie rod sinnlarly engages lugs 22 projecting upwardly trom the beams. The members 21 and 22 are of course concentric with the turning centers, or pivots of the trucks so that the tie rods will be taut at all times.

The lugs are each concavely recessed so as to tiltably and rotatably receive and su J- port the downwardly projecting convexly curved or rounded central lug 23 of a bolster 24. The bolster 24 is provided near its ends with a pair of integral segments that are adapted to contact with and travel or oscillate on a pair of supporting rollers 26 (see Figs. 4 and 5). The rollers 26 are mounted in plunger bars 27 that are slidably mounted in the ends of the cross beams 17. The bars 27 have limited upward movements, but are pressable do\\'nwardly against compression springs 2S, which operate in suitable chambers 29. The bars S27 are provided with rectailguiar or non-circular portions, as shown g in Figs. 4, 5 and (i, which guide in similarly shaped slots. This prevents turning oi the bars and insures proper positioning ol the rollers .Zt' with respect to the segments 25. As the sprin su pport a large part of the normal weight of the far, they are compressed before heilig put in place, and may only yield when the weight of the car is heavier on one side than the other as when going around a curve or when its load is unevenly distributed. The springs will also of course absorb much ofthe shock and vibration between the truck units and car body7 proper.

The driven truck unit, B, is operated by a pair oi electric motors 30 and 31, which respectively drive the axles 11 and l2, through sprocket pinions 32, ot' the motors, sprocket chains 33, and sprocket gears 34 secured on the axles. The motors are mounted on brackets 35, that are secured at their inner ends to the Cross beam 17, While their outer ends are secured over the opposite ailles or the truck. As shown in Figs. 7 and 8 the gear Wheels Slare provided, upon both sides, with Wood or fabricated disk segments 36, which are securely fastened, as by bolts, and which serve to absorb much of the noise and vibration that would otherwise be present.

It is understood that suitable modifications may be made in the general design and struetural details of the invention as herein shown, provided, however7 that seid modifications come wit-hin the spirit and scope et the appended Claims. Having now therefore fully shown and described my intention, what l claim to be new and desire to protect by Let ters Patent is:

l. ln a. ear truck, a :trame daring' a cross beam, and Wheel axles mounted in the frame one in front and the other rearwardly of the eross beam, a pair of transversely disposed motors mounted one at eaeh side of the cross beam, and endless flexible members driven by the motors for respectively driving the axles zit the opposite sides of the beam.

2. In a ear truck, a frame having a cross beam, and Wheel axles mounted in the frame one in liront and the other rearwardly or the cross bemin a pair oi' motors mounted one at each side of the cross beam7 and sprocket Chain drive Connections between the motors and axles.

3. In a. ear truck, a iframe havingv a cross beam9 and Wheel z les mounted in the treme one in front and the other rearwardly ol the cross beam7 a pair of motor brackets rigidly secured with their inner ends to the er herum end 'their outer ends to the reipeetive wheel axles, and motors mounted on said brackets -`with connections for driving the rospeetire axles at the opposite sides ot the beam.

lin testimony whereof atiix my signature.

SOLUMN i5. VHHDPS. 

